Vintage, Estate, Antique, these are descriptive words sellers use to describe previously worn jewelry. They could have also used Old, Used, Worn out. The piece of jewelry would not have seemed so attractive with those words.
Too often I see someone who has purchased Vintage, Estate or Antique jewelry online or at an antique store and they tell me what a great deal they got until they find out how much it is going to cost to tighten all those loose diamonds that are barely holding on.